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1
1<?php
2
3namespace GrowthExperiments\NewcomerTasks\Topic;
4
5use MediaWiki\Json\JsonUnserializer;
6use Message;
7use MessageLocalizer;
8
9/**
10 * A topic used for a specific editing campaign. Uses a separate namespace for ID and message keys,
11 * and an arbitrary search expression (which could be manually configured by e.g. event organizers).
12 */
13class CampaignTopic extends Topic {
14
15    /** @var string */
16    private $searchExpression;
17
18    /**
19     * @param string $id Topic ID, a string consisting of lowercase alphanumeric characters
20     *   and dashes. E.g. 'biology'. Will be prefixed by 'campaign-' to avoid conflicts with
21     *   regular topics.
22     * @param string $searchExpression The search expression which selects articles belonging
23     *   to this topic. E.g. 'biology' or 'hastemplate:Taxobox'.
24     */
25    public function __construct( string $id, string $searchExpression ) {
26        parent::__construct( $id, 'campaign' );
27        $this->searchExpression = $searchExpression;
28    }
29
30    /**
31     * The search expression which selects articles belonging to this topic.
32     * @return string
33     */
34    public function getSearchExpression(): string {
35        return $this->searchExpression;
36    }
37
38    /** @inheritDoc */
39    public function getName( MessageLocalizer $messageLocalizer ): Message {
40        // These topic names are defined on-wiki, not in the software.
41        return $messageLocalizer->msg( 'growth-campaign-topic-name-' . $this->getId() );
42    }
43
44    /** @inheritDoc */
45    protected function toJsonArray(): array {
46        return [
47            'id' => $this->getId(),
48            'searchExpression' => $this->getSearchExpression(),
49        ];
50    }
51
52    /** @inheritDoc */
53    public static function newFromJsonArray( JsonUnserializer $unserializer, array $json ) {
54        return new self( $json['id'], $json['searchExpression'] );
55    }
56
57}